forked from Deuxfleurs/garage
174 lines
4.9 KiB
Rust
174 lines
4.9 KiB
Rust
use std::collections::HashMap;
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use std::net::SocketAddr;
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use std::sync::Arc;
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use futures::future::Future;
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use hyper::body::{Bytes, HttpBody};
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use hyper::server::conn::AddrStream;
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use hyper::service::{make_service_fn, service_fn};
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use hyper::{Body, Method, Request, Response, Server};
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use garage_util::error::Error;
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use garage_core::garage::Garage;
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use crate::http_util::*;
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use crate::signature::check_signature;
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use crate::s3_get::{handle_get, handle_head};
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use crate::s3_list::handle_list;
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use crate::s3_put::{handle_delete, handle_put};
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pub type BodyType = Box<dyn HttpBody<Data = Bytes, Error = Error> + Send + Unpin>;
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pub async fn run_api_server(
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garage: Arc<Garage>,
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shutdown_signal: impl Future<Output = ()>,
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) -> Result<(), Error> {
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let addr = &garage.config.s3_api.api_bind_addr;
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let service = make_service_fn(|conn: &AddrStream| {
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let garage = garage.clone();
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let client_addr = conn.remote_addr();
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async move {
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Ok::<_, Error>(service_fn(move |req: Request<Body>| {
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let garage = garage.clone();
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handler(garage, req, client_addr)
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}))
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}
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});
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let server = Server::bind(&addr).serve(service);
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let graceful = server.with_graceful_shutdown(shutdown_signal);
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info!("API server listening on http://{}", addr);
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graceful.await?;
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Ok(())
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}
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async fn handler(
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garage: Arc<Garage>,
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req: Request<Body>,
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addr: SocketAddr,
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) -> Result<Response<BodyType>, Error> {
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info!("{} {} {}", addr, req.method(), req.uri());
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debug!("{:?}", req);
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match handler_inner(garage, req).await {
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Ok(x) => {
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debug!("{} {:?}", x.status(), x.headers());
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Ok(x)
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}
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Err(e) => {
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let body: BodyType = Box::new(BytesBody::from(format!("{}\n", e)));
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let mut http_error = Response::new(body);
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*http_error.status_mut() = e.http_status_code();
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warn!("Response: error {}, {}", e.http_status_code(), e);
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Ok(http_error)
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}
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}
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}
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async fn handler_inner(
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garage: Arc<Garage>,
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req: Request<Body>,
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) -> Result<Response<BodyType>, Error> {
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let path = req.uri().path().to_string();
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let path = path.trim_start_matches('/');
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let (bucket, key) = match path.find('/') {
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Some(i) => {
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let (bucket, key) = path.split_at(i);
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let key = key.trim_start_matches('/');
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(bucket, Some(key))
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}
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None => (path, None),
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};
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if bucket.len() == 0 {
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return Err(Error::Forbidden(format!(
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"Operations on buckets not allowed"
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)));
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}
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let api_key = check_signature(&garage, &req).await?;
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let allowed = match req.method() {
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&Method::HEAD | &Method::GET => api_key.allow_read(&bucket),
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_ => api_key.allow_write(&bucket),
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};
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if !allowed {
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return Err(Error::Forbidden(format!(
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"Operation is not allowed for this key."
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)));
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}
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if let Some(key) = key {
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match req.method() {
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&Method::HEAD => Ok(handle_head(garage, &bucket, &key).await?),
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&Method::GET => Ok(handle_get(garage, &bucket, &key).await?),
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&Method::PUT => {
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let mime_type = req
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.headers()
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.get(hyper::header::CONTENT_TYPE)
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.map(|x| x.to_str())
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.unwrap_or(Ok("blob"))?
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.to_string();
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let version_uuid =
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handle_put(garage, &mime_type, &bucket, &key, req.into_body()).await?;
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let response = format!("{}\n", hex::encode(version_uuid,));
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Ok(Response::new(Box::new(BytesBody::from(response))))
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}
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&Method::DELETE => {
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let version_uuid = handle_delete(garage, &bucket, &key).await?;
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let response = format!("{}\n", hex::encode(version_uuid,));
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Ok(Response::new(Box::new(BytesBody::from(response))))
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}
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_ => Err(Error::BadRequest(format!("Invalid method"))),
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}
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} else {
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match req.method() {
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&Method::PUT | &Method::HEAD => {
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// If PUT: corresponds to a bucket creation call
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// If we're here, the bucket already exists, so just answer ok
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let empty_body: BodyType = Box::new(BytesBody::from(vec![]));
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let response = Response::builder()
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.header("Location", format!("/{}", bucket))
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.body(empty_body)
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.unwrap();
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Ok(response)
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},
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&Method::DELETE => Err(Error::Forbidden(
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"Cannot delete buckets using S3 api, please talk to Garage directly"
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.into(),
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)),
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&Method::GET => {
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let mut params = HashMap::new();
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if let Some(query) = req.uri().query() {
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let query_pairs = url::form_urlencoded::parse(query.as_bytes());
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for (key, val) in query_pairs {
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params.insert(key.to_lowercase(), val.to_string());
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}
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}
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if ["delimiter", "prefix"]
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.iter()
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.all(|x| params.contains_key(&x.to_string()))
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{
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let delimiter = params.get("delimiter").unwrap();
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let max_keys = params
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.get("max-keys")
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.map(|x| {
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x.parse::<usize>().map_err(|e| {
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Error::BadRequest(format!("Invalid value for max-keys: {}", e))
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})
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})
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.unwrap_or(Ok(1000))?;
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let prefix = params.get("prefix").unwrap();
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Ok(handle_list(garage, bucket, delimiter, max_keys, prefix).await?)
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} else {
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Err(Error::BadRequest(format!(
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"Not a list call, so what is it?"
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)))
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}
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}
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_ => Err(Error::BadRequest(format!("Invalid method"))),
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}
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}
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}
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